Ghost stairs

The stairs are like a magician's illusion, coming out of nowhere. They are also like the start of a live performance where a stage sets itself up, ready for the play. I hope you understand me!

@Chris Hester Yes Yes! I understand you. You have described very well. It's really very similar

Wow ! And I thought I had solved it correctly, but I see in your VS B was much faster than me with the waterfall balls! I took B around again on pillar to redirect him. Awesome stairs and so smooth....thanks very much

@Sammy 5 ,Oh I'm very glad that you liked, thank you VERY MUCH